#include "../../common/etcd.hpp"
#include <gflags/gflags.h>
#include <thread> 
#include <brpc/server.h>
#include <butil/logging.h>
#include "main.pb.h"

DEFINE_bool(run_mode, false, "程序的运行模式, false-调试模式, true-发布模式");
DEFINE_string(log_file, "", "发布模式下, 用于指定日志文件的路径");
DEFINE_int32(log_level, 0, "发布模式下, 用于指定日志的输出等级");

DEFINE_string(etcd_host, "http://127.0.0.1:2379", "这是服务注册中心的地址");
DEFINE_string(base_service, "/service", "这是服务监控根目录");
DEFINE_string(instance_name, "/echo/instance", "当前实例名称");
DEFINE_string(access_host, "127.0.0.1:7070", "当前实例的外部访问地址");
DEFINE_int32(listen_port, 7070, "RPC服务监听的端口号");

class EchoServiceImpl : public example::EchoService {
public:
    EchoServiceImpl() {}
    ~EchoServiceImpl() {}
    // 实现Echo方法
    void Echo(google::protobuf::RpcController* controller,
        const ::example::EchoRequest* request,
        ::example::EchoResponse* response,
        ::google::protobuf::Closure* done)
    {
        brpc::ClosureGuard rpc_done(done);  // 确保done执行，RAII机制在析构的时候自动调用done->Run()
        std::cout << "收到消息: " << request->message() << std::endl;

        std::string msg = request->message() + "--这是响应!";
        response->set_message(msg);
    }
};

int main(int argc, char* argv[])
{
    google::ParseCommandLineFlags(&argc, &argv, false);
    // 初始化日志器
    Init_logger(FLAGS_run_mode, FLAGS_log_file, FLAGS_log_level);

    // 关闭brpc的日志输出
    logging::LoggingSettings settings;
    settings.logging_dest = logging::LoggingDestination::LOG_TO_NONE;
    logging::InitLogging(settings);
    // 2.构造服务器对象
    brpc::Server server;
    // 3.向服务器对象中，新增EchoService的服务
    EchoServiceImpl echo_service;
    int ret = server.AddService(&echo_service, brpc::ServiceOwnership::SERVER_DOESNT_OWN_SERVICE);    
    if (ret != 0) {
        std::cout << "添加rpc服务失败" << std::endl;
        return -1;
    }

    // 4.启动服务器
    brpc::ServerOptions options;
    options.idle_timeout_sec = -1;  // 连接空闲超时时间-超时后连接会被关闭
    options.num_threads = 1;        // io线程数量
    ret = server.Start(FLAGS_listen_port, &options);  
    if (ret == -1) {
        std::cout << "启动服务器失败" << std::endl;
        return -1;
    }

    // 5.注册服务
    Registry::ptr rclient = std::make_shared<Registry>(FLAGS_etcd_host);
    rclient->registry(FLAGS_base_service + FLAGS_instance_name, FLAGS_access_host);

    server.RunUntilAskedToQuit();   // 休眠等待服务器退出
    return 0;
}